You can create scrip or you can simply run from command line.
run from shell prompt.
Code:
# for i in {1..100}; do echo "name-$i IN A ip-$i"; done >> you_file_name
or create script file with same syntex.
# vim test
Code:
#!/bin/bash
for i in {1..254}
do
echo "domain-name-$i.info IN A 10.0.0.$i" >> test_file
done
Hope this help you
NOTE: always run command/script on test environment before applying on production environment.
Regards,
